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The discrete complex image method is one of the most prominent techniques that handle the Sommerfeld integrals encountered in the integral equation formulations of multilayered media. The extraction of surface waves extends the validity of the method to the far field. These surface waves are expressed in terms of Hankel functions that suffers a singularity problem at the origin which contaminates the results in the near field. In this work,we use a formulation developed recently by the author to derive a new expression for the surface waves. The new expression is shown to obviate the singularity of the Hankel functions at the origin,and hence leads to accurate results in the near field.

A NEW APPROACH TO EVALUATE THE SURFACE WAVES TERM FOR THE NONSYMMETRICAL COMPONENTS OF GREEN'S FUNCTIONS IN MULTILAYERED MEDIA